Safety razor



J. MUROS SAFETY RAZOR July ll, 1933.

2 Sheets-Sheet l Filed July 30. 1932 close/D Murat //omay J. MUROSSAFETY RAZOR July l1, 1933.

Filed July 30. 1932 2 Sheets-Sheet 2 25 Izumi/i074 /0 /Z 705905 Mams:1r/ey Patented Juiy'11, 1933 UNITED ,STATES PATENT OFFICE JOSEPH MRJOS,F BELMONT, MASSA'CHUSET'IS, ASSIGNOR "T0 GILLETTE SAFETY RAZOR COMPANY,OF BOSTON, MASSACHUSETTS, A CORPORATION DELAWARE SAFETY RAZOR It is anobject ofth-islinvention to provide a safety razor` of the sectionalpivoted cap variety utilizing a. liexible blade which may be vsupportedon a member having a curved supporting surface without fulcrum shouldersor a surface curved or flat having fulcrum shoulders. The blade beingrflexed across said surface to aid in holding it and lin which the blademay be Securely clamped and amply adjusted Without disturbing thevunitary bodilyl movement relation .of the pivoted cap'sections o rmembers with reference to each other inA making the blade adjustment.

It is a furtherl object of this invention to produce an organization inwhich the cap sections have tilting as well as unitary bodily movementand in which the blade is engaged bythe caps as closely as` practical toits shaving edges thereby permitting .the manufacturer to locateaccurately the desired I positions Aof the critical edges "of the capmain connected whilethe blade isbeing sections.

It is s till a further object of this invention to provide a'razor inwhich the parts replied or removed therefrom land providing ample spaceresulting from bodily movement of said cap sections whereby thisoperation may be made-with safety, facility and eXpe= dition. I.,

It is also an object of this invention to provide an organization havingample space l for manipulation and adjustment and location of. 'criticaledges on the cap sections and in which the invention lends itself toample reinforcement yet provides ample clearance for the escape oflather and hai rthereby to facilitate the cleansing and drying of therazor-- A It lis a further object to prodiice a pivoted sectional caprazor providing u'nitary automatic synchronized control mechanismoperating at substantially vuniform speed for bodily to produce theIblade adjustments and pivotally to open'and closed positions.

` The invention is illustrated in the follow. ing embodiments -in which-the details of lstructure and the relation of saiddetails', in`

1932. seriai No. 626,287.

cluding the functions thereof,l will be readi# lyuiiderstood by any oneskilled in the art to which it appertains.

Fig., 1 is a-perspective view in condition for shaving.

Fig. 2 is a transver section' of the blade, the cap and guardconstruction, and the blade support, showing the manner of securing thebla de supportrto the upper part of the handle. Fig. 3 is a centraltransverse section of the razor head including avlongitudinal section ofthe handle in the same plane.`

Fig. 4 is a transverse section through the vrazor head adjacentthe endof the bladesupport and cap`inembers showing the link connectionsbetween the blade support and the guard rails or spindles of the cap,members. Fig. 5- is a stepped transverse^section through the razor headand a part of the A lhandle as indicated by the line 5 5 of Fig.7

on the guard rails or spindles of the cap members. f

The .blade support or base 10 is provided with blade positioning means11 and fulcrum` shoulders 12 across which the blade 13 may be flexed todesired position of adjustment for shaving.' .leu The lower portion ofthe base 10 is provided with a housing recess 14which in combinationwith the upper recessed section 16 of the handle 15 forms a housing andthrust bearings or supports for the worm 17 o n the 'shaft 18. The shaft18 is aligned longitudithe cap sections whereby. they may be moved-nally by the bore 20 in the handle section 16 and the bushing 19 in thelower portion of 18 isf provided with a-finger secured 'to'said shaft. Yv

l The combined guard `and cap member is a plan view of the razor withthe worm and the Worin-wheel sectors formed" the handle 15. The lo'werend of the shaft A sections are connected to the blade support 10 by theuse of links 22 whichare pivotally connected to the blade support 10 bypins 23 and to the guard rails or spindles 24 by pins 25. The links 22are provided with stop shoulders 26 at inner upper corners to limit theupward swinging movement of said links which also arrest the translatoryor bodily movement of the combined cap and guard construction.

The cap member sections 27 are fixedly secured at their ends to the-ends of the guard or 4spindles in any suitable manner.. The remote orcritical edges'28 of the cap sections are arranged as closely aspractical to the shaving edges 29 of the blade 13 thereby minimizing thevibration of the'blade when itis flexed to adj usted positionsover theful-l drum shoulders `12 of the blade support 10.

The worm gear control'mechanism ycomprises the inverted frusto-conicalgear 17 having a thread to engage with the wormwheel sectors 30 on theguards or spindles 24. The blade support 10 and the guards are providedwith co-operating stop vengaging surface portions `located at 31 and 32`respectively. These co-operating portions 31 and 32 prevent the cap andguard construction from tilting until the portions 32 on the. guard 24clear the portions 31 on the blade support as clearly shown in Fig. 5,thereby providing for flexing of the blade 13 and adjusting of the blade,edges 29 to suit the user of the razor. y v

The planes defined by the surface portions 31 and 32 are substantiallyparallel to the chords of the/arcs generated by the movement of theadjacent outer ends of the links 22. Likewise the surface inclination ofthe frusto-conical worm at the ends of the diameters transverse to therazor head, are also substantially parallel to the planes defined by theadjacent portions 31 and 32. It will be apparent from this detaileddescription that the cap and guard members are controlled bysynchronized control mechanism, whereby they may be moved bodily toproduce blade adjustments and pivotally or angularly to open and closethe cap members. I n this connection it is to be noted that thefrusto-conicalworm 17 .by having the larger portion uppermost maintainsproper engagement with ,thel worm-wheel sectors 3() as the links 22permit the guards 24 to swing slightly away from the axis of the worm17.

The spindle or guard 24 comprises a guard rail having recesses 33forming on said rail guard teeth 34.

The handle section 16 is provided with rivets 35 which secure the handlesection 16 to the blade support 10 as clearly indicated in Figs. 2 and7. l

During the movementof translation of the cap and guard members themeeting edges 36 of the cap members are maintained in contact. Whentheco-operating stop portions 31 and 32 are out of engagement asindicated in Fig. 5 further movement of translation is prevented by thestop shoulders 26 as also clearly indicated in Fig. 5. Further rotation70 of the worm 17' propels the tilting of the cap sections which resultsin widely spacing of the sections to facilitate the removal andreplacement of a blade on the blade support. The link connection incombination with the rusto-conical worm and gear mechanism results bothin ample clearance for the'manipu- 'lation of the blade and permitsengagement of the critical edges 28 of the cap close to the shaving edge29 thereby producing a mechan- 80 ical means to amply grip the blade andreduce vibration of the blade while shaving.

In addition to the new results pointed out it is also to 'be noted thatthe construction retains a very important feature disclosed inapplicants application Serial No. 587,551, filed January 19, 1932, whichlends itself to maintenance of ample clearance for cleansing purposes.The cap and guard members are lock-controlled by the Worm-gear mechanismhence the cap' and guard members are maintained in adjusted or setpositions until and unless theAvorm-gear/ mechanism is operated throughthe medium of the shaft 18 and the finger grip 21. The lock controleature is very desirable and important since 'it facilitatesmanipulation and cleansing and assures a set position of adjustment atall times of the cap and guard members with reference to the blade orblade support.

Itl is to be further observed that during the movement of puretranslation of the can a guard members these members are additionallylocked againstangular or pivotal movement by the co-operative engagementof the portions 31 and 32.

Althoughy I have disclosed a specificqembodiment of my invention Idesire to have it understood'that my claims shall cover a range lofequivalents commensurate with the invention disclosed. a

What I claim is 1. A safety razor comprising a razor head anda handle,said head includingr a blade support, a blade positioned on saidsupport, A

a cap comprising pivoted sections provided with guards forming pivotalsupports for said sections, mechanical means movably c'onnecting saidguards to theiblade support,

'means onlsaid razor to produce bodily yor 120 translatory movement ofsaid cap and guards as a unit for axlimited distance, and angular orpivotal movement of the cap sections with reference to each other asWell as the blade or blade'support, whereby the blade may be 125 clampedeffectivelyy in shaving position and when the cap sections are open andspaced apart the blade may be easily' removed Land replaced.

2. A safety razor comprising a head and a 1" handle, said head includinga blade support, a blade positioned on said support, and a sectional caphaving guards, means comprising links pivotally connecting each cap andguard, as a unit, to the blade support, means on said razor to producebodily or translatory movement of said cap and guards, as a unit, for alimited distance, and subsequently an angular or pivotal movement ofsaid cap seclions and guards relatively to each other and to the blade.y

A safety razor comprising a head and a handle, said head including ablade support, a blade positioned on said support, and combined capsection and guard units, a plurality of links pivotally connecting saidunits to the blade support, gear mechanism on said razor to actuate thecap sections and guards, means on said guards and blade support to guidesaid cap sections and guards, as a unit, in a substantially straightline Inovement for a limited distance, and means to subsequently produceangular or pivotal movement of each cap and guard unit relatively toeach other and to the blade support.

4. A safety razor comprising a head and a handle, said head including ablade supnw a blade positioned on said support, and individual cap andguard units, a plurality of links pivotally connecting said units to theblade support, worm gear mechanism on the razor to actuate the cap andguard units, coacting means on said guards and blade support to guidesaid units in a substantially straight line movement for a limiteddistance and means to subsequently produce angular or pivotal movementof said cap and guard units relatively to each other and to said bladesupport.

5. A safety razor comprising a head and a handle, said head including ablade support, a blade positioned on said support and a plurality of capand guard members pivotally connected to the blade support by links,said links being mounted for limited oscillation between planes locatedbelow the plane of the blade, said guard members comprising rails orspindles having on each spindle a worm wheel sector whereby the cap andguard members may be oscillated to any desired position of adjustmentwith reference to each other and to the blade, a shaft in said handleprovided with a frusto-conical Worm having its threads in engagementwith the worm wheel sectors, the larger part of the worm being uppermostwhereby effective engagement is maintained between the worm and wormwheel sectors as the guard rails move through upwardly slightly recedingarcs.

6. A safety razor comprising a head and a handle, said head including ablade support, a blade positioned thereon, and cap and guardmembers,flinks pivotally connecting said guard members to said bladesupport for swinging and tilting movement of said cap and guard memberswith reference to each other and the blade support and blade, thepivotal connections of links and blade support-being located in a commonplane and the pivotal connections of the links with the guard membersbeing located in a common plane below but parallel with the first namedplane, coacting stop engaging portions on said blade support and linksto limit the swinging movement of said guard members to small upwardlyslightly receding arcs no longer than the distance between the planesabove mentioned, coacting operating mechanism on said razor engagingsaid guard members to actuate said cap members from blade clampingposition to open position and to any position of adjustment between thetwo ext-renie positions mentioned.

7. In a safety razor a blade support, a blade positioned on saidsupport, cap and guard members connected to said support by a pluralityof links, said cap members having critical blade clamping edges, theconnections of the links and support intersect a common plane and theconnections between the guard members and the links also ,intersect acommon plane parallel to but spaced below the first named plane, meanson said support engaging said guard members to produce limited swingingmovement of said cap and guard in arcs slightly receding upwardly fromeach other, whereby the critical edges of the cap members lnay belocated as close as practical to the shaving edges of the blade tominimize vibration of the blade while shaving.

8. In a safety razor, a blade support having a blade shaping face, aflexible blade located on said support, cap and guard members movablyconnected to said support, said cap members having blade shaping facesand critical blade clamping edges, coacting actuating means on saidrazor engaging said guards in combination with movement control meansfor said cap and guard members whereby the guards are guided in smallarcs which recede from each other upwardly as the clamping members arereleased from clamping engagement of the blade whereby the criticaledges may be brought as nearly as practical to the shaving edges of theblade to minimize vibration while shaving.

9. A safety razor comprising a head and a handle, said head including ablade support, a blade positioned on said support, cap and guard membersmovably connected to said support in combination with means to produceboth swinging and tilting movements of said cap and guard members withreference to each other and to the blade and blade suport. p 10. Asafety razor comprising a head and a handle, said head including a bladesupport having a blade-shaping face, a flexible blade positioned onsaid' support, and cap and guard members movably connected to said bladesupport, said cap members having blade-shaping faces and criticalclamping edges, mechanism on said razor engaging said guard members toproduce initially a tilting of the cap members toward each other untilthe critical edges engage the blade and finally a downward blade flexingmovement to any desired degree of adjustment of the blade edges forshaving. y

11. A safety razor comprising a head and a handle, said head including ablade support having a blade-shaping face, a blade on said support, capand guard members having links connecting said guards swingably andtiltably to the blade support, said cap lmembers having blade-shapingfaces and critical clamping edges, worm gear mechanism to actuate saidcap and guard members, said guard members having Worm-wheel sectors andthe handle having a shaft carrying the worm and maintaining it inengagement with the worm-wheel sectors, stop engaging surface portionson said guards and blade support to guide the cap and guard members inplanes substantially parallel with the chords of the arcs described bythe outer portions of the links in their swinging movement whereby theblade may be released from its flexed condition, coacting stop means onsaid links and blade support to limit the swinging movement of the capand guard members, the stop means to prevent tilting of the guards beingsynchronized to co-operate with the link stop means to permit tilting ofthe guard, whereby the blade may be flexed and adjusted to a desiredposition for shavmg. *i

12. In a safety razor a blade support, a plurality of cap and guardmembers connected to said blade support by a plurality of links wherebysaid cap and guard members may tilt and swing with reference to`eachother and the blade support, in combination with means to actuate andcontrol the movement of the cap and guard members with reference to thesupport and each other.

13. In a safety razor a blade support, a plurality of cap and guardmembers connected to said blade support by a plurality of links wherebysaid cap and guard members may both tilt and swing with reference toeach other andthe blade support, means on ,the razor to actuate the capand guard members, in combination with synchronized control mechanismtocontrol successively the tilting and swinging movements of said capand guard members.

14. In a safety razor including a blade support, pivotally mounted capsections thereon, and arotatable handle member having cam connectionsfor tilting said sections through a wide arc toward blade-flexingposition, and means operating thereafter to move them bodily intoblade-flexing position for shaving. f

15. In a safety razor including a blade support, cap sections pivotallymounted thereon, and a rotatable handle member providing cam connectionsrhaving camming surface portions of uniform pitch for tilting saidsections at a substantially uniform speed through a Wide arc towardAblade-flexing p0- sition, and means to guide, control and propelmovement of said sections bodily intoV bladeflexing position forshaving.

JOSEPH MUROS.

